Which plugins in particular are being used by WordPress.com?

I'm setting up a WordPress install on my own hosting, and would like to know which particular plugins WordPress.com uses (besides Jetpack and Akismet), especially those related to widget functionality.

All of the plugins included in Jetpack, which is for WordPress.ORG installs are installed on this WordPress.com platform. Jetpack was invented to appease WordPress.ORG bloggers who were desirous of having the same in-house features and functions that WordPress.COM blogs had, so "parity" became the agenda and Jetpack was created.

@auxclass: I've looked at the WordPress.com Widgets docs, and all I got out of that is Jetpack. Of all the widgets that don't come built-in to WordPress, only the page for the Twitter widget even mentions a plugin to provide its functionality -- the others offer not even a clue about which plugins are being used.

Also on WordPress.org sites you can easily locate and install Flicker and Delicious widgets. Check this one out > A Flickr WordPress plugin to display your photos either as a gallery, a galleria or a unbranded slideshow in posts, pages, and sidebar widgets. http://wordpress.org/extend/plugins/slickr-flickr/